I've been crunching numbers as in-depth as possible, taking into
account every possibility - from the Frost Monster and Snowbluff
Monster at 22/min to the Sun Monster at 168/min. I've even taken
into consideration the max number of monsters in a habitat, the max
coins each habitat can retain, and until they finally updated the
Andriod version of the game to allow expansion - I was tempted to
consider size as a factor as well!

This is part of a series of articles looking at how to maximize
overal income so that you can buy all the cool upgrades and
decorations you want!

Now, typically this would be a discriptor for the Legendary
Monster and it's associated Legacy Monsters - but much like them,
Air Monsters, Shadow Monsters and Light Monsters all have a root
monster that cannot be bought for coins.

Another trend with these elements and Water Monsters as well is
that their ideal income-generating creature is available for
breeding imm…

This article pulls data points from the various monster pages
and trys to determine the highest earners for each habitat. This
becomes complex for the earlier habitats of Fire, Earth, Plant, Ice
and Electric because better options often become available as a new
element is unlocked.

Below each section is the raw data (hidden for convenience).
Most of the data is copi…